KR102226297B1 - synthetic resine packaging bag and method of manufacturing the same - Google Patents

Abstract

The present invention relates to a synthetic resin packaging bag and a manufacturing method thereof, wherein the synthetic resin packaging bag has a front end positioned at a position spaced apart from the lower surface and one end of the lower surface, and is joined along the edge of the lower surface to have an opening and form a first internal accommodation space. A main body having an upper surface that extends longer than the tip of the upper surface from one end of the lower surface, and a cover sheet arranged to cover a part of the upper surface, and both sides are formed to be bonded by a bonding material and face the upper surface of the cover sheet. A bonding tape with a first release paper attached to the inner side along the direction parallel to the extension direction of the top of the upper side and the other side, and the bottom of the cover sheet when the edge of the upper side is thermally bonded to the bottom side. A separation guide sheet is provided from the inside of the cover sheet to extend longer than the cover sheet from one end of the lower surface to the upper surface of the cover sheet to prevent bonding with the cover sheet, and the separation guide sheet is a thermal bonding and cutting cutter that descends vertically. After the edge of the upper surface has been treated to be bonded to the lower surface by means of, for smooth separation between the cover sheet and the lower surface, a bonding inhibiting layer coated with a bonding inhibiting material is provided on a base paper made of a synthetic resin material. According to such a synthetic resin packaging bag and its manufacturing method, the separation stability and efficiency of the cover sheet from the base sheet after the thermal bonding process are improved by the separation guide sheet inserted between the cover sheet and the base sheet, thereby suppressing damage. Provides.

Description

Synthetic resin packaging bag and method of manufacturing the same

The present invention relates to a synthetic resin packaging bag and a method for manufacturing the same, and in particular, a synthetic resin packaging capable of improving the separation efficiency in the manufacturing process of a sealing cover sheet formed so that the accommodation space can be closed by bonding of double-sided tape. It relates to an envelope and a method of manufacturing the same.

Envelopes formed to accommodate documents or objects to be packaged are formed of various materials such as paper bags and synthetic resin bags, and are used according to the material.

In addition, in the case of packaging bags used for the purpose of accommodating packaging materials, packaging bags that can facilitate the sealing process by attaching double-sided tape with release paper attached to the cover sheet to close the entrance of the packaging bag are also widely used. In addition, the detailed structure has been proposed in various ways, including domestic open utility model no. 95-6269 and open utility model no. 20-2015-0004563.

In addition, in the case of packaging bags made of synthetic resin materials, various equipment such as domestic utility model registration No. 20-0371763 have been proposed that can be automatically produced by thermal bonding.

On the other hand, in the case of a packaging bag made of synthetic resin, a so-called'heda bag' that can be used for a handle by forming a groove and a reinforcing sheet having a higher shape retention than the original paper on the top of the cover sheet with double-sided tape is widely used .

In order to automatically produce packaging bags with a heda bag structure, thermal bonding and cutting processes must be performed while the original paper is folded as much as the length into which the reinforcement sheet is inserted and the length of the cover sheet is extended. In this process, the edge of the cover sheet also forms a storage space. Since it is thermally bonded together with the edge of the region, there is a need for a manufacturing method capable of improving the separation efficiency of the cover sheet after the thermal bonding process.

The present invention is invented to solve the above requirements, and provides a synthetic resin packaging bag and a manufacturing method thereof in which a separation guide sheet is applied between a cover sheet and a base paper so as to improve the separation efficiency of the cover sheet during thermal bonding. There is a purpose.

In order to achieve the above object, the synthetic resin packaging bag according to the present invention has a front end positioned at a position spaced apart from the lower surface and one end of the lower surface, and is joined along the edge of the lower surface to have an opening and form a first internal accommodation space. A body having an upper surface; A cover sheet extending from one end of the lower surface to be longer than a tip end of the upper surface so as to cover a portion of the upper surface; A first release paper that is formed so that both sides can be bonded by a bonding material, and one side is bonded along a direction parallel to the extension direction of the front end of the cover sheet on the inner side opposite to the top side of the cover sheet, and can be separated on the other side. A bonding tape to which is attached; When the edge of the upper surface is thermally bonded to the lower surface, it is inserted so as to extend longer than the cover sheet from one end of the lower surface to the upper surface of the upper surface from the inside of the cover sheet to prevent bonding with the lower surface of the cover sheet. The separation guide sheet is provided, and the separation guide sheet is treated to be bonded to the edge of the upper surface to the lower surface by a vertically descending thermal bonding and cutting cutter, and then seamlessly separates the cover sheet and the lower surface. For this purpose, a bonding inhibiting layer coated with a bonding inhibiting material on a base paper made of a synthetic resin material;

Preferably, the bonding inhibiting layer is formed by printing with an ink containing a polyamide-based resin.

In addition, the main body extends from one end of the lower surface opposite the direction toward the front end of the upper surface and is formed of the same material as the upper surface and the lower surface to have a second internal accommodation space divided from the first internal accommodation space, and ; A reinforcing sheet inserted into the head and made of a PET material is further provided, wherein the body is formed of a polypropylene material, and the base is formed of a polyethylene material.

In addition, in order to achieve the above object, the method of manufacturing the synthetic resin packaging bag according to the present invention is a. The first folded part that has a first width along the width direction and partially overlaps each other vertically through the process of folding the other end toward one end with respect to one end in the width direction of the original paper sheet extending in a direction perpendicular to the width direction And processing to have it; I. Bonding a double-sided tape to an upper end of the base sheet in the width direction; All. Through a process in which one end of the original sheet is folded over the top of the first folded portion, the second folded portion is treated to have a second folded portion on the top of the first folded portion, and a reinforcing sheet and a separation guide are provided in the space formed in the second folded portion. Inserting the sheets to be spaced apart from each other; la. Thermally bonding a portion into which the reinforcing sheet is inserted to have a partitioned inner space; bar. Including; thermal bonding and cutting along the width direction of the base sheet to correspond to the size to be cut, wherein the separation guide sheet is made of a synthetic resin material for smooth separation from the cover sheet and the lower surface after the bar step. And a bonding inhibiting layer coated with a bonding inhibiting material on the base paper.

According to the synthetic resin packaging bag and its manufacturing method according to the present invention, the separation stability and efficiency of the cover sheet from the original sheet after the thermal bonding process are improved by the separation guide sheet inserted between the cover sheet and the original sheet to suppress damage. Provides an advantage to be able to.

1 is a perspective view showing a synthetic resin packaging bag according to the present invention,
Figure 2 is a cross-sectional view of the synthetic resin packaging bag of Figure 1,
3 is a substantial cross-sectional view of the synthetic resin packaging bag of FIG. 1,
3 is a process chart for explaining the manufacturing process of the synthetic resin packaging bag of FIG.

Hereinafter, a synthetic resin packaging bag and a manufacturing method thereof according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

Figure 1 is a perspective view showing a synthetic resin packaging bag according to the present invention, Figure 2 is a cross-sectional view of the synthetic resin packaging bag of Figure 1, Figure 1 is a perspective view showing the synthetic resin packaging bag according to the present invention, Figure 3 is Is a practical cross-sectional view of a synthetic resin packaging bag.

1 to 3, the synthetic resin packaging bag 100 according to the present invention includes a main body 110, a head portion 120, a reinforcing sheet 125, a cover sheet 130, a bonding tape 140, and a separation A guide sheet 150 is provided.

For reference, FIGS. 1 and 2 are shown in a state in which the cover sheet 130 is lifted above the main body 110 for convenience of explanation and understanding, and when manufacturing is completed through a manufacturing process, the main body as shown in FIG. 3 The cover sheet 130 is seated on (110).

The main body 110 is formed to be accommodated by inserting a packaged object therein.

When the main body 110 is divided for convenience of explanation, the lower surface 112 extending in the form of a square sheet, and the front end 114a are located at a position spaced apart from the one end 112a of the lower surface 112 so that the lower surface 112 It has a structure having an upper surface 114 that is joined along the edge of and forms a first inner receiving space 110b having an opening 110a.

Here, the opening 110a of the main body 110 refers to a portion that is not joined between the front end 114a and the lower surface 112 of the upper surface 111 and communicates with the first internal accommodation space.

The body 110 may be formed of a polypropylene material. Preferably, the main body 110 is formed of a polypropylene film to which 25 to 35 parts by weight of calcium carbonate is added based on 100 parts by weight of polypropylene so as to increase the efficiency of accelerating decomposition over time.

The head portion 120 extends from one end 112a of the lower surface 112 toward the front end 114a of the upper surface 114, that is, the opposite side, and is made of the same material as the upper surface 114 and the lower surface 112. It is formed to have a second internal accommodation space (120a) divided by the first internal accommodation space (110b) and the junction line (127).

In the center of the head portion 120, a through hole 122 penetrating up and down is formed.

The reinforcing sheet 125 is inserted into the second internal receiving space 120a of the head portion 120 and is cut open so that a portion corresponding to the through hole 122 of the head portion 120 is opened.

It is preferable to apply the reinforcing sheet formed of a PET (polyethylene terephthalate) material in the form of a sheet.

The cover sheet 130 extends longer than the front end 114a of the upper surface 114 from the one end 112a of the lower surface 112 and is disposed on the upper surface 114 to cover a part of the upper surface 114.

The cover sheet 130 is provided to be bonded to the upper surface 114 of the main body 110 when the first internal accommodation space 110b of the main body 110 is to be closed.

Bonding tape 140 is a double-sided tape formed so that both sides can be bonded by a bonding material is applied. Bonding tape 140 of the front end 114a of the upper surface 114 of the main body 110 on the inner surface 130a of the cover sheet 130 opposite to the upper surface 114 of the body 110 of the cover sheet 130 A first release paper separated on the other side so that one side is joined by a bonding material along the direction parallel to the extension direction, and the cover sheet 130 is sealedly bonded to the upper surface 114 on the other side to which the bonding material is attached. 142) is attached.

The bonding tape 140 may be bonded to the cover sheet 130 at a position where it can be bonded to the upper surface 114 of the main body 110.

Separation guide sheet 150 is the edge 112b of the lower surface 112 and the edge of the upper surface 114 by a cutter for thermal bonding and cutting (refer to FIG. 3, 200) descending vertically through a manufacturing process to be described later ( In the process of processing 114b) to be bonded, the upper surface 114 from the one end 112a of the body 110 and the lower surface 112 from the inside of the cover sheet 130 to prevent bonding between the cover sheet 130 and the lower surface 112. ) Is inserted to extend longer than the cover sheet 130.

Separation guide sheet 150 is smoothly separated from the cover sheet 130 and the lower surface 112 after processing so that the lower surface 112 of the main body 110, the edge 112b and the edge 114b of the upper surface 114 are joined For this purpose, it has a structure having a bonding inhibiting layer 153 coated with a bonding inhibiting material on a base paper 151 made of a synthetic resin material different from that of the main body 110.

As the base paper 151, a sheet formed of a polyethylene material may be applied.

The bonding inhibiting layer 153 is preferably formed by printing with an ink containing polyamide resin.

The ink forming the bonding inhibiting layer 153 may be coated with an ink applied for printing on a sheet made of synthetic resin.

As an example, the bonding inhibiting layer 153 prepares a basic solute in which 0.1 to 10 parts by weight of a pigment and 0.01 to 5 parts by weight of an additive including a wax are added based on 100 parts by weight of a polyamide resin, and 100 parts by weight of the prepared basic solute The ink formed by mixing with 10 to 50 parts by weight of a solvent including at least one of toluene, isopropylene alcohol, and ethyl acetate may be applied to form a curing process.

Here, of course, 50 to 50 parts by weight of white solid content and 30 to 40 parts by weight of colored solid content may be additionally added to the basic solute based on 100 parts by weight of the polyamide resin.

In addition, the bonding inhibiting layer 153 is exemplified that is formed on the upper surface of the base paper 151, and it is of course possible to apply a coating treatment to both the upper and lower surfaces of the base paper 151.

The bonding inhibiting layer 153 functions to reduce thermal bonding force with the cover sheet 130.

This separation guide sheet 150 prevents bonding with the main body 110, the lower surface 112 and the upper surface 114 of the cover sheet 130, as well as smooth separation from the main body lower surface 112 and the cover sheet 130. You can apply.

Hereinafter, the manufacturing process of such a synthetic resin packaging bag will be described with reference to FIG. 4.

First, with respect to one end 101a in the width direction of the original paper sheet 101 having a first width d along the width direction and extending in a direction orthogonal to the width direction, the other end 101b faces one end 101a. Through the process of folding in the direction, it is processed to have the first folded portion 102 partially overlapping each other in the vertical phase.

Next, the double-sided tape 140 is bonded to the upper portion of the base sheet 101 near one end 101a in the width direction of the region outside the first folded portion 102. At this time, the first release paper 142 may be bonded to be positioned on the upper side.

Thereafter, the one end 101a of the base sheet 101 is partially overlapped on the top of the first folded portion 102 to have a second folded portion 103 through a process, and the second folded portion 103 is In the formed space, the reinforcing sheet 125 and the separation guide sheet 150 are inserted to be spaced apart from each other.

Next, the heat bonding treatment is performed to have a second internal accommodation space 120a in which the reinforcing sheet 125 is inserted. In the thermal bonding treatment, various bonding methods may be applied, such as a method of irradiating laser light to be bonded. Reference numeral 127 denotes a bonding line formed by bonding between the second folded portion 103 and the underlying paper sheet 103 by thermal bonding.

Next, thermal bonding and cutting are performed along the width direction of the base sheet 101 to correspond to the size to be cut. That is, the vertically descending thermal bonding and cutting cutter 200 is lowered to perform thermal bonding and cutting along the width direction of the base sheet 101 to correspond to the size to be cut. After this process, as shown in FIG. 3, around the opening 110a, the lower surface 112, the separation guide sheet 130, and the cover sheet 140 are sequentially stacked in close contact with each other, and the separation guide The sheet 130 is in a weak bonded state that can be easily separated from the lower surface 112 and the cover sheet 130 of the body 110, so when the operator applies an external force to separate the body 110 and the cover sheet 130 ) Is separated without being damaged.

On the other hand, this manufacturing process can be carried out through equipment that automatically performs a folding process, attaching a double-sided tape, inserting an auxiliary sheet, and cutting a process while transferring the raw sheet through rollers.

In addition, when the operation of punching the packaging bag that has undergone the cutting process so as to have the through hole 122 in the head portion 120 is performed, the manufacturing of the packaging bag shown in FIG. 3 is completed.

To pack the packaged object in such a packaging bag, the separation guide sheet 130 is removed while the cover sheet 130 is separated from the main body 110 by lifting the separation guide sheet 130 upward. Is inserted into the first internal receiving space 110b through the opening 110a, and then the first release paper 142 is separated and the cover sheet 130 is adhered to the upper surface 114 of the body.

According to the synthetic resin packaging bag and its manufacturing method described above, the separation stability and efficiency of the cover sheet from the original sheet after the thermal bonding process are improved by the separation guide sheet inserted between the cover sheet and the original sheet to suppress damage. Provides an advantage to be able to.

110: main body 120: head
125: reinforcement sheet 130: cover sheet
140: bonding tape 150: separation guide sheet

Claims (5)

delete delete A main body having a lower surface and an upper surface having a front end positioned at a position spaced apart from one end of the lower surface and joined along an edge of the lower surface to have an opening and to form a first internal accommodation space;
A cover sheet extending from one end of the lower surface to be longer than a tip end of the upper surface so as to cover a portion of the upper surface;
A first release paper that is formed so that both sides can be joined by a bonding material, and one side is bonded along a direction parallel to the extension direction of the tip of the top surface on the inner side opposite to the top surface of the cover sheet, and can be separated on the other side. A bonding tape to which is attached;
When the edge of the upper surface is thermally bonded to the lower surface, it is inserted so as to extend longer than the cover sheet from one end of the lower surface to the upper surface of the upper surface from the inside of the cover sheet to prevent bonding with the lower surface of the cover sheet. It has a separation guide sheet;
After the separation guide sheet is treated so that the edge of the upper surface is bonded to the lower surface by a vertically descending thermal bonding and cutting cutter, the cover sheet and the lower surface are separated from each other on a base paper made of synthetic resin material. It includes; a bonding inhibiting layer coated with a bonding inhibiting material,
The bonding inhibiting layer is formed by printing with an ink containing a polyamide resin,
The main body includes a head portion extending from one end of the lower surface opposite to the front end of the upper surface and formed of the same material as the upper surface and the lower surface to have a second internal accommodation space partitioned from the first internal accommodation space;
A reinforcing sheet inserted into the head and made of a PET material; further comprising,
The body is formed by containing a polypropylene material, and the base is a synthetic resin packaging bag, characterized in that formed of a polyethylene material.
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